1887.] 



On Parieasauras bombidens {Owen). 



337 



Observations, &c. {continued). 



Die Osterreichische Polarstation Jan Mayen. Beobachtungs- 

 Ergebnisse. Herausg. von der Kaiserl. Akad. der Wissen- 

 schaften. Band II. Abth. 2. 4to. Wien [1887]. 



The Academy. 



London : — Colonial and Indian Exhibition, 1886. Reports on the . 

 Colonial Sections. 8vo. London 1887. 



The Society of Arts. 



Madrid : — Real Observatorio. Annario. Ano III. 8vo. Madrid 

 1862. Ano VII. 8vo. Madrid 1865. The Observatory. 



Washington : — Office of Comptroller of the Currency. Report. 

 1886. 8vo. Washington. The Comptroller. 



II. S. Geological Survey. Mineral Resources of the United 

 States, 1885. 8vo. Washington 1886. The Survey. 



May 12, 1887. 



Professor G. G. STOKES, D.C.L., President, in the Chair. 



The Presents received were laid on the table, and thanks ordered 

 for them. 



The following Croonian Lecture was delivered : — 



CROONIAN LECTURE. — " On Parieasaurus bombidens (Owen), and 

 tbe Significance of its Affinities to Amphibians, Reptiles, 

 and Mammals." By H. G. Seeley, F.R.S., Professor of 

 Geography in King's College, London. Received April 21, 

 1887. 



(Abstract.) 



The author gives a short account of the literature of Parieasaurus, 

 and describes a skeleton in the British Museum, received from the 

 Karoo deposits of South Africa in 1878. 



The head has the external bones pitted and grooved as in Labyrin- 

 thodonts and Crocodiles, and mucns canals are developed between 

 the nares and orbits such as characterise Labyrinthodontia. The 

 palate, as evidenced by Parieasaurus serridens (Owen), is essentially 

 Anomodont in structure. The dentition, with some distinctive features, 

 approximates to that of Dinosaurs and Crocodiles, but though the 

 teeth are in sockets they are cemented to the jaw by bone. 



